[gps-talkusers] Re: GPS FRUSTRATIONS
- From: Charles LaPierre <charles@xxxxxxxxxxxxxxxx>
- To: gps-talkusers@xxxxxxxxxxxxx
- Date: Wed, 16 Jan 2008 16:37:35 -0800
Hello Paul,
What you have experienced is called GPS drift. What is happening is
that the gps thinks you are moving around even though you are
stationary. That is why we tell you your estimated accuracy +- x
number of feet and there for that means you can be + 30 feet ahead or
- 30 feet behind, actually anywhere within a 30 feet radius circle
could be your "real" location. The Sendero GPS software trys to
hide most of this by figuring out what is drift and what is real
movement but when all of a sudden the GPS receiver jumps 20 feet
ahead with a velocity of 5 or 6 miles per hour we have to belive the
GPS receiver and then you get these false readings you are
experiencing. You definitely get more of these when inside a
building with the more sensitive GPS receivers out now-a-days but it
still can happen under idea circumstances.
Charles.
At 04:17 PM 1/16/2008, you wrote:
I was sitting on my front porch this morning with my bn in my lap
and connected to the gps with my new Hollux 1000. As I sat there, I
was told that my home was actually a ways behind me, but more
interestingly, the bn kept giving me information at random about how
I was traveling and telling me about the closest street even though
I wasn't moving.
I'd never seen it just put out random information before like that.
I had six satellites.
Paul Henrichsen
<mailto:paulh52@xxxxxxxxxxx>paulh52@xxxxxxxxxxx
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Charles M. La Pierre CTO
Sendero Group, LLC
Lat. 37 15' 25" N Lon: 121 53' 04" W
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